2.1,4.5,8.9,16.13,32.17,()

题库总管2019-12-17  9

问题 2.1,4.5,8.9,16.13,32.17,()

选项 A. 64.19B. 64.21C. 128.19D. 128.21

答案B

解析知识点:等差数列 多重数列隔项看,小数点前面是2的N次方,后面是等差数列,差值为4
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